1 | #include "EXTERN.h" |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
3 | #include "XSUB.h" |
4 | |
4 | |
5 | #if 1 |
5 | #include "libcoro/coro.c" |
6 | # define CHK(x) (void *)0 |
6 | |
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7 | #ifdef HAVE_MMAP |
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8 | # include <unistd.h> |
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9 | # include <sys/mman.h> |
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10 | # ifndef MAP_ANON |
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11 | # ifdef MAP_ANONYMOUS |
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12 | # define MAP_ANON MAP_ANONYMOUS |
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13 | # else |
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14 | # undef HAVE_MMAP |
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15 | # endif |
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16 | # endif |
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17 | #endif |
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18 | |
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19 | #define MAY_FLUSH /* increases codesize */ |
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20 | |
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21 | /* perl-related */ |
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22 | #define TRANSFER_SAVE_DEFAV 0x00000001 |
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23 | #define TRANSFER_SAVE_DEFSV 0x00000002 |
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24 | #define TRANSFER_SAVE_ERRSV 0x00000004 |
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25 | /* c-related */ |
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26 | #define TRANSFER_SAVE_CCTXT 0x00000008 |
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27 | #ifdef CORO_LAZY_STACK |
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28 | # define TRANSFER_LAZY_STACK 0x00000010 |
7 | #else |
29 | #else |
8 | # define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) |
30 | # define TRANSFER_LAZY_STACK 0x00000000 |
9 | #endif |
31 | #endif |
10 | |
32 | |
11 | #define MAY_FLUSH /* increases codesize */ |
33 | #define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \ |
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34 | |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT) |
12 | |
35 | |
13 | #define SAVE_DEFAV 0x00000001 |
36 | #define SUB_INIT "Coro::State::initialize" |
14 | #define SAVE_DEFSV 0x00000002 |
37 | #define UCORO_STATE "_coro_state" |
15 | #define SAVE_ERRSV 0x00000004 |
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16 | |
38 | |
17 | #define SAVE_ALL -1 |
39 | /* The next macro should delcare a variable stacklevel that contains and approximation |
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40 | * to the current C stack pointer. It's property is that it changes with each call |
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41 | * and should be unique. */ |
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42 | #define dSTACKLEVEL void *stacklevel = &stacklevel |
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43 | |
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44 | #define labs(l) ((l) >= 0 ? (l) : -(l)) |
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45 | |
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46 | /* this is actually not only the c stack but also c registers etc... */ |
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47 | typedef struct { |
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48 | int refcnt; /* pointer reference counter */ |
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49 | int usecnt; /* shared by how many coroutines */ |
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50 | int gencnt; /* generation counter */ |
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51 | |
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52 | coro_context cctx; |
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53 | |
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54 | void *sptr; |
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55 | long ssize; /* positive == mmap, otherwise malloc */ |
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56 | } coro_stack; |
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57 | |
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58 | static coro_stack main_stack = { 1, 0, 0 }; |
18 | |
59 | |
19 | struct coro { |
60 | struct coro { |
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61 | /* the optional C context */ |
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62 | coro_stack *stack; |
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63 | void *cursp; |
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64 | int gencnt; |
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65 | |
20 | /* optionally saved, might be zero */ |
66 | /* optionally saved, might be zero */ |
21 | AV *defav; |
67 | AV *defav; |
22 | SV *defsv; |
68 | SV *defsv; |
23 | SV *errsv; |
69 | SV *errsv; |
24 | |
70 | |
… | |
… | |
49 | I32 savestack_max; |
95 | I32 savestack_max; |
50 | OP **retstack; |
96 | OP **retstack; |
51 | I32 retstack_ix; |
97 | I32 retstack_ix; |
52 | I32 retstack_max; |
98 | I32 retstack_max; |
53 | COP *curcop; |
99 | COP *curcop; |
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100 | JMPENV start_env; |
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101 | JMPENV *top_env; |
54 | |
102 | |
55 | /* data associated with this coroutine (initial args) */ |
103 | /* data associated with this coroutine (initial args) */ |
56 | AV *args; |
104 | AV *args; |
57 | }; |
105 | }; |
58 | |
106 | |
59 | typedef struct coro *Coro__State; |
107 | typedef struct coro *Coro__State; |
60 | typedef struct coro *Coro__State_or_hashref; |
108 | typedef struct coro *Coro__State_or_hashref; |
61 | |
109 | |
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110 | static AV *main_mainstack; /* used to differentiate between $main and others */ |
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111 | static HV *coro_state_stash; |
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112 | static SV *ucoro_state_sv; |
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113 | static U32 ucoro_state_hash; |
62 | static HV *padlist_cache; |
114 | static HV *padlist_cache; |
63 | |
115 | |
64 | /* mostly copied from op.c:cv_clone2 */ |
116 | /* mostly copied from op.c:cv_clone2 */ |
65 | STATIC AV * |
117 | STATIC AV * |
66 | clone_padlist (AV *protopadlist) |
118 | clone_padlist (AV *protopadlist) |
… | |
… | |
229 | #endif |
281 | #endif |
230 | |
282 | |
231 | #define SB do { |
283 | #define SB do { |
232 | #define SE } while (0) |
284 | #define SE } while (0) |
233 | |
285 | |
234 | #define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE |
286 | #define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE |
235 | #define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE |
287 | #define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE |
236 | |
288 | |
237 | #define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
289 | #define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE |
238 | |
290 | |
239 | static void |
291 | static void |
240 | load_state(pTHX_ Coro__State c) |
292 | load_state(pTHX_ Coro__State c) |
… | |
… | |
264 | PL_savestack_max = c->savestack_max; |
316 | PL_savestack_max = c->savestack_max; |
265 | PL_retstack = c->retstack; |
317 | PL_retstack = c->retstack; |
266 | PL_retstack_ix = c->retstack_ix; |
318 | PL_retstack_ix = c->retstack_ix; |
267 | PL_retstack_max = c->retstack_max; |
319 | PL_retstack_max = c->retstack_max; |
268 | PL_curcop = c->curcop; |
320 | PL_curcop = c->curcop; |
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321 | PL_start_env = c->start_env; |
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322 | PL_top_env = c->top_env; |
269 | |
323 | |
270 | if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
324 | if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); |
271 | if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
325 | if (c->defsv) REPLACE_SV (DEFSV , c->defsv); |
272 | if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
326 | if (c->errsv) REPLACE_SV (ERRSV , c->errsv); |
273 | |
327 | |
… | |
… | |
300 | save_state(pTHX_ Coro__State c, int flags) |
354 | save_state(pTHX_ Coro__State c, int flags) |
301 | { |
355 | { |
302 | { |
356 | { |
303 | dSP; |
357 | dSP; |
304 | I32 cxix = cxstack_ix; |
358 | I32 cxix = cxstack_ix; |
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359 | PERL_CONTEXT *ccstk = cxstack; |
305 | PERL_SI *top_si = PL_curstackinfo; |
360 | PERL_SI *top_si = PL_curstackinfo; |
306 | PERL_CONTEXT *ccstk = cxstack; |
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307 | |
361 | |
308 | /* |
362 | /* |
309 | * the worst thing you can imagine happens first - we have to save |
363 | * the worst thing you can imagine happens first - we have to save |
310 | * (and reinitialize) all cv's in the whole callchain :( |
364 | * (and reinitialize) all cv's in the whole callchain :( |
311 | */ |
365 | */ |
312 | |
366 | |
313 | PUSHs (Nullsv); |
367 | PUSHs (Nullsv); |
314 | /* this loop was inspired by pp_caller */ |
368 | /* this loop was inspired by pp_caller */ |
315 | for (;;) |
369 | for (;;) |
316 | { |
370 | { |
317 | do |
371 | do |
318 | { |
372 | { |
319 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
373 | PERL_CONTEXT *cx = &ccstk[cxix--]; |
320 | |
374 | |
321 | if (CxTYPE(cx) == CXt_SUB) |
375 | if (CxTYPE(cx) == CXt_SUB) |
322 | { |
376 | { |
… | |
… | |
361 | } |
415 | } |
362 | |
416 | |
363 | PUTBACK; |
417 | PUTBACK; |
364 | } |
418 | } |
365 | |
419 | |
366 | c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
420 | c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; |
367 | c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
421 | c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; |
368 | c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
422 | c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; |
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423 | |
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424 | /* I have not the slightest idea of why av_reify is necessary */ |
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425 | /* but if it's missing the defav contents magically get replaced sometimes */ |
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426 | if (c->defav) |
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427 | av_reify (c->defav); |
369 | |
428 | |
370 | c->dowarn = PL_dowarn; |
429 | c->dowarn = PL_dowarn; |
371 | |
430 | |
372 | c->curstackinfo = PL_curstackinfo; |
431 | c->curstackinfo = PL_curstackinfo; |
373 | c->curstack = PL_curstack; |
432 | c->curstack = PL_curstack; |
… | |
… | |
392 | c->savestack_max = PL_savestack_max; |
451 | c->savestack_max = PL_savestack_max; |
393 | c->retstack = PL_retstack; |
452 | c->retstack = PL_retstack; |
394 | c->retstack_ix = PL_retstack_ix; |
453 | c->retstack_ix = PL_retstack_ix; |
395 | c->retstack_max = PL_retstack_max; |
454 | c->retstack_max = PL_retstack_max; |
396 | c->curcop = PL_curcop; |
455 | c->curcop = PL_curcop; |
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456 | c->start_env = PL_start_env; |
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457 | c->top_env = PL_top_env; |
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458 | } |
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459 | |
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460 | /* |
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461 | * allocate various perl stacks. This is an exact copy |
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462 | * of perl.c:init_stacks, except that it uses less memory |
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463 | * on the assumption that coroutines do not usually need |
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464 | * a lot of stackspace. |
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465 | */ |
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466 | STATIC void |
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467 | coro_init_stacks (pTHX) |
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468 | { |
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469 | PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); |
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470 | PL_curstackinfo->si_type = PERLSI_MAIN; |
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471 | PL_curstack = PL_curstackinfo->si_stack; |
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472 | PL_mainstack = PL_curstack; /* remember in case we switch stacks */ |
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473 | |
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474 | PL_stack_base = AvARRAY(PL_curstack); |
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475 | PL_stack_sp = PL_stack_base; |
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476 | PL_stack_max = PL_stack_base + AvMAX(PL_curstack); |
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477 | |
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478 | New(50,PL_tmps_stack,96,SV*); |
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479 | PL_tmps_floor = -1; |
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480 | PL_tmps_ix = -1; |
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481 | PL_tmps_max = 96; |
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482 | |
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483 | New(54,PL_markstack,16,I32); |
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484 | PL_markstack_ptr = PL_markstack; |
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485 | PL_markstack_max = PL_markstack + 16; |
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486 | |
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487 | SET_MARK_OFFSET; |
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488 | |
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489 | New(54,PL_scopestack,16,I32); |
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490 | PL_scopestack_ix = 0; |
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491 | PL_scopestack_max = 16; |
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492 | |
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493 | New(54,PL_savestack,96,ANY); |
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494 | PL_savestack_ix = 0; |
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495 | PL_savestack_max = 96; |
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496 | |
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497 | New(54,PL_retstack,8,OP*); |
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498 | PL_retstack_ix = 0; |
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499 | PL_retstack_max = 8; |
397 | } |
500 | } |
398 | |
501 | |
399 | /* |
502 | /* |
400 | * destroy the stacks, the callchain etc... |
503 | * destroy the stacks, the callchain etc... |
401 | * still there is a memleak of 128 bytes... |
504 | * still there is a memleak of 128 bytes... |
… | |
… | |
437 | Safefree(PL_scopestack); |
540 | Safefree(PL_scopestack); |
438 | Safefree(PL_savestack); |
541 | Safefree(PL_savestack); |
439 | Safefree(PL_retstack); |
542 | Safefree(PL_retstack); |
440 | } |
543 | } |
441 | |
544 | |
442 | #define SUB_INIT "Coro::State::_newcoro" |
545 | static void |
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546 | allocate_stack (Coro__State ctx, int alloc) |
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547 | { |
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548 | coro_stack *stack; |
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549 | |
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550 | New (0, stack, 1, coro_stack); |
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551 | |
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552 | stack->refcnt = 1; |
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553 | stack->usecnt = 1; |
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554 | stack->gencnt = ctx->gencnt = 0; |
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555 | if (alloc) |
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556 | { |
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557 | #ifdef HAVE_MMAP |
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558 | stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write */ |
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559 | stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0); |
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560 | if (stack->sptr == (void *)-1) |
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561 | #endif |
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562 | { |
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563 | /*FIXME*//*D*//* reasonable stack size! */ |
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564 | stack->ssize = -4096 * sizeof (long); |
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565 | New (0, stack->sptr, 4096, long); |
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566 | } |
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567 | } |
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568 | else |
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569 | stack->sptr = 0; |
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570 | |
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571 | ctx->stack = stack; |
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572 | } |
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573 | |
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574 | static void |
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575 | deallocate_stack (Coro__State ctx) |
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576 | { |
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577 | coro_stack *stack = ctx->stack; |
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578 | |
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579 | ctx->stack = 0; |
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580 | |
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581 | if (stack) |
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582 | { |
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583 | if (!--stack->refcnt) |
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584 | { |
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585 | #ifdef HAVE_MMAP |
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586 | if (stack->ssize > 0 && stack->sptr) |
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587 | munmap (stack->sptr, stack->ssize); |
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588 | else |
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589 | #else |
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590 | Safefree (stack->sptr); |
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591 | #endif |
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592 | Safefree (stack); |
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593 | } |
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594 | else if (ctx->gencnt == stack->gencnt) |
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595 | --stack->usecnt; |
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596 | } |
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597 | } |
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598 | |
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599 | static void |
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600 | setup_coro (void *arg) |
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601 | { |
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602 | /* |
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603 | * emulate part of the perl startup here. |
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604 | */ |
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605 | dSP; |
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606 | Coro__State ctx = (Coro__State)arg; |
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607 | SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE); |
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608 | |
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609 | coro_init_stacks (aTHX); |
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610 | JMPENV_BOOTSTRAP; |
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611 | SPAGAIN; |
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612 | |
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613 | /*PL_curcop = 0;*/ |
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614 | SvREFCNT_dec (GvAV (PL_defgv)); |
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615 | GvAV (PL_defgv) = ctx->args; |
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616 | |
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617 | if (ctx->stack) |
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618 | { |
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619 | ctx->cursp = 0; |
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620 | |
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621 | PUSHMARK(SP); |
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622 | PUTBACK; |
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623 | (void) call_sv (sub_init, G_VOID|G_NOARGS); |
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624 | croak ("FATAL: CCTXT coroutine returned!"); |
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625 | } |
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626 | else |
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627 | { |
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628 | UNOP myop; |
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629 | |
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630 | PL_op = (OP *)&myop; |
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631 | |
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632 | Zero(&myop, 1, UNOP); |
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633 | myop.op_next = Nullop; |
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634 | myop.op_flags = OPf_WANT_VOID; |
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635 | |
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636 | PUSHMARK(SP); |
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637 | XPUSHs (sub_init); |
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638 | /* |
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639 | * the next line is slightly wrong, as PL_op->op_next |
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640 | * is actually being executed so we skip the first op. |
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641 | * that doesn't matter, though, since it is only |
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642 | * pp_nextstate and we never return... |
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643 | * ah yes, and I don't care anyways ;) |
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644 | */ |
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645 | PUTBACK; |
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646 | PL_op = pp_entersub(); |
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647 | SPAGAIN; |
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648 | |
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649 | ENTER; /* necessary e.g. for dounwind */ |
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650 | } |
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651 | } |
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652 | |
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653 | static void |
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654 | continue_coro (void *arg) |
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655 | { |
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656 | /* |
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657 | * this is a _very_ stripped down perl interpreter ;) |
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658 | */ |
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659 | Coro__State ctx = (Coro__State)arg; |
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660 | |
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661 | ctx->cursp = 0; |
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662 | PL_op = PL_op->op_next; |
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663 | CALLRUNOPS(aTHX); |
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664 | /*NORETURN*/ |
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665 | abort (); |
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666 | } |
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667 | |
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668 | STATIC void |
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669 | transfer(pTHX_ struct coro *prev, struct coro *next, int flags) |
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670 | { |
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671 | dSP; |
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672 | dSTACKLEVEL; |
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673 | |
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674 | if (prev != next) |
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675 | { |
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676 | if (next->mainstack) |
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677 | { |
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678 | SAVE (prev, flags); |
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679 | LOAD (next); |
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680 | |
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681 | /* mark this state as in-use */ |
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682 | next->mainstack = 0; |
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683 | next->tmps_ix = -2; |
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684 | |
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685 | /* stacklevel changed? if yes, grab the stack for us! */ |
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686 | if (flags & TRANSFER_SAVE_CCTXT) |
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687 | { |
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688 | if (!prev->stack) |
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689 | allocate_stack (prev, 0); |
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690 | else if (prev->cursp != stacklevel |
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691 | && prev->stack->usecnt > 1) |
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692 | { |
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693 | prev->gencnt = ++prev->stack->gencnt; |
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694 | prev->stack->usecnt = 1; |
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695 | } |
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696 | |
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697 | /* has our stack been invalidated? */ |
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698 | if (next->stack && next->stack->gencnt != next->gencnt) |
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699 | { |
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700 | deallocate_stack (next); |
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701 | allocate_stack (next, 1); |
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702 | coro_create (&(next->stack->cctx), |
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703 | continue_coro, (void *)next, |
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704 | next->stack->sptr, labs (next->stack->ssize)); |
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705 | } |
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706 | |
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707 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
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708 | } |
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709 | |
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710 | } |
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711 | else if (next->tmps_ix == -2) |
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712 | croak ("tried to transfer to running coroutine"); |
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713 | else |
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714 | { |
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715 | SAVE (prev, -1); /* first get rid of the old state */ |
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716 | |
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717 | if (flags & TRANSFER_SAVE_CCTXT) |
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718 | { |
|
|
719 | if (!prev->stack) |
|
|
720 | allocate_stack (prev, 0); |
|
|
721 | |
|
|
722 | if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK) |
|
|
723 | { |
|
|
724 | setup_coro (next); |
|
|
725 | |
|
|
726 | prev->stack->refcnt++; |
|
|
727 | prev->stack->usecnt++; |
|
|
728 | next->stack = prev->stack; |
|
|
729 | next->gencnt = prev->gencnt; |
|
|
730 | } |
|
|
731 | else |
|
|
732 | { |
|
|
733 | allocate_stack (next, 1); |
|
|
734 | coro_create (&(next->stack->cctx), |
|
|
735 | setup_coro, (void *)next, |
|
|
736 | next->stack->sptr, labs (next->stack->ssize)); |
|
|
737 | coro_transfer (&(prev->stack->cctx), &(next->stack->cctx)); |
|
|
738 | } |
|
|
739 | } |
|
|
740 | else |
|
|
741 | setup_coro (next); |
|
|
742 | } |
|
|
743 | } |
|
|
744 | |
|
|
745 | next->cursp = stacklevel; |
|
|
746 | } |
443 | |
747 | |
444 | MODULE = Coro::State PACKAGE = Coro::State |
748 | MODULE = Coro::State PACKAGE = Coro::State |
445 | |
749 | |
446 | PROTOTYPES: ENABLE |
750 | PROTOTYPES: ENABLE |
447 | |
751 | |
448 | BOOT: |
752 | BOOT: |
|
|
753 | { /* {} necessary for stoopid perl-5.6.x */ |
|
|
754 | ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); |
|
|
755 | PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); |
449 | HV * stash = gv_stashpvn("Coro::State", 10, TRUE); |
756 | coro_state_stash = gv_stashpv ("Coro::State", TRUE); |
450 | |
757 | |
451 | newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); |
758 | newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); |
452 | newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); |
759 | newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); |
453 | newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); |
760 | newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); |
|
|
761 | newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); |
454 | |
762 | |
455 | if (!padlist_cache) |
763 | if (!padlist_cache) |
456 | padlist_cache = newHV (); |
764 | padlist_cache = newHV (); |
|
|
765 | |
|
|
766 | main_mainstack = PL_mainstack; |
|
|
767 | } |
457 | |
768 | |
458 | Coro::State |
769 | Coro::State |
459 | _newprocess(args) |
770 | _newprocess(args) |
460 | SV * args |
771 | SV * args |
461 | PROTOTYPE: $ |
772 | PROTOTYPE: $ |
… | |
… | |
465 | if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
776 | if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV) |
466 | croak ("Coro::State::_newprocess expects an arrayref"); |
777 | croak ("Coro::State::_newprocess expects an arrayref"); |
467 | |
778 | |
468 | New (0, coro, 1, struct coro); |
779 | New (0, coro, 1, struct coro); |
469 | |
780 | |
|
|
781 | coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
470 | coro->mainstack = 0; /* actual work is done inside transfer */ |
782 | coro->mainstack = 0; /* actual work is done inside transfer */ |
471 | coro->args = (AV *)SvREFCNT_inc (SvRV (args)); |
783 | coro->stack = 0; |
472 | |
784 | |
473 | RETVAL = coro; |
785 | RETVAL = coro; |
474 | OUTPUT: |
786 | OUTPUT: |
475 | RETVAL |
787 | RETVAL |
476 | |
788 | |
477 | void |
789 | void |
478 | transfer(prev, next, flags = SAVE_DEFAV) |
790 | transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) |
479 | Coro::State_or_hashref prev |
791 | Coro::State_or_hashref prev |
480 | Coro::State_or_hashref next |
792 | Coro::State_or_hashref next |
481 | int flags |
793 | int flags |
|
|
794 | PROTOTYPE: @ |
482 | CODE: |
795 | CODE: |
483 | |
796 | transfer (aTHX_ prev, next, flags); |
484 | if (prev != next) |
|
|
485 | { |
|
|
486 | /* |
|
|
487 | * this could be done in newprocess which would lead to |
|
|
488 | * extremely elegant and fast (just SAVE/LOAD) |
|
|
489 | * code here, but lazy allocation of stacks has also |
|
|
490 | * some virtues and the overhead of the if() is nil. |
|
|
491 | */ |
|
|
492 | if (next->mainstack) |
|
|
493 | { |
|
|
494 | SAVE (prev, flags); |
|
|
495 | LOAD (next); |
|
|
496 | /* mark this state as in-use */ |
|
|
497 | next->mainstack = 0; |
|
|
498 | next->tmps_ix = -2; |
|
|
499 | } |
|
|
500 | else if (next->tmps_ix == -2) |
|
|
501 | { |
|
|
502 | croak ("tried to transfer to running coroutine"); |
|
|
503 | } |
|
|
504 | else |
|
|
505 | { |
|
|
506 | /* |
|
|
507 | * emulate part of the perl startup here. |
|
|
508 | */ |
|
|
509 | UNOP myop; |
|
|
510 | |
|
|
511 | SAVE (prev, -1); /* first get rid of the old state */ |
|
|
512 | |
|
|
513 | init_stacks (); /* from perl.c */ |
|
|
514 | SPAGAIN; |
|
|
515 | |
|
|
516 | PL_op = (OP *)&myop; |
|
|
517 | /*PL_curcop = 0;*/ |
|
|
518 | SvREFCNT_dec (GvAV (PL_defgv)); |
|
|
519 | GvAV (PL_defgv) = next->args; |
|
|
520 | |
|
|
521 | Zero(&myop, 1, UNOP); |
|
|
522 | myop.op_next = Nullop; |
|
|
523 | myop.op_flags = OPf_WANT_VOID; |
|
|
524 | |
|
|
525 | PUSHMARK(SP); |
|
|
526 | XPUSHs ((SV*)get_cv(SUB_INIT, TRUE)); |
|
|
527 | /* |
|
|
528 | * the next line is slightly wrong, as PL_op->op_next |
|
|
529 | * is actually being executed so we skip the first op. |
|
|
530 | * that doesn't matter, though, since it is only |
|
|
531 | * pp_nextstate and we never return... |
|
|
532 | * ah yes, and I don't care anyways ;) |
|
|
533 | */ |
|
|
534 | PUTBACK; |
|
|
535 | PL_op = pp_entersub(aTHX); |
|
|
536 | SPAGAIN; |
|
|
537 | |
|
|
538 | ENTER; /* necessary e.g. for dounwind */ |
|
|
539 | } |
|
|
540 | } |
|
|
541 | |
797 | |
542 | void |
798 | void |
543 | DESTROY(coro) |
799 | DESTROY(coro) |
544 | Coro::State coro |
800 | Coro::State coro |
545 | CODE: |
801 | CODE: |
546 | |
802 | |
547 | if (coro->mainstack) |
803 | if (coro->mainstack && coro->mainstack != main_mainstack) |
548 | { |
804 | { |
549 | struct coro temp; |
805 | struct coro temp; |
550 | |
806 | |
551 | SAVE(aTHX_ (&temp), SAVE_ALL); |
807 | SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); |
552 | LOAD(aTHX_ coro); |
808 | LOAD(aTHX_ coro); |
553 | |
809 | |
554 | destroy_stacks (); |
810 | destroy_stacks (aTHX); |
555 | |
811 | |
556 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
812 | LOAD((&temp)); /* this will get rid of defsv etc.. */ |
|
|
813 | |
|
|
814 | coro->mainstack = 0; |
557 | } |
815 | } |
|
|
816 | |
|
|
817 | deallocate_stack (coro); |
558 | |
818 | |
559 | Safefree (coro); |
819 | Safefree (coro); |
560 | |
820 | |
561 | void |
821 | void |
562 | flush() |
822 | flush() |
563 | CODE: |
823 | CODE: |
564 | #ifdef MAY_FLUSH |
824 | #ifdef MAY_FLUSH |
565 | flush_padlist_cache (); |
825 | flush_padlist_cache (); |
566 | #endif |
826 | #endif |
567 | |
827 | |
|
|
828 | MODULE = Coro::State PACKAGE = Coro::Cont |
568 | |
829 | |
|
|
830 | # this is slightly dirty |
|
|
831 | |
|
|
832 | void |
|
|
833 | yield(...) |
|
|
834 | PROTOTYPE: @ |
|
|
835 | CODE: |
|
|
836 | static SV *returnstk; |
|
|
837 | SV *sv; |
|
|
838 | AV *defav = GvAV (PL_defgv); |
|
|
839 | struct coro *prev, *next; |
|
|
840 | |
|
|
841 | if (!returnstk) |
|
|
842 | returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); |
|
|
843 | |
|
|
844 | /* set up @_ -- ugly */ |
|
|
845 | av_clear (defav); |
|
|
846 | av_fill (defav, items - 1); |
|
|
847 | while (items--) |
|
|
848 | av_store (defav, items, SvREFCNT_inc (ST(items))); |
|
|
849 | |
|
|
850 | mg_get (returnstk); /* isn't documentation wrong for mg_get? */ |
|
|
851 | sv = av_pop ((AV *)SvRV (returnstk)); |
|
|
852 | prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))); |
|
|
853 | next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))); |
|
|
854 | SvREFCNT_dec (sv); |
|
|
855 | |
|
|
856 | transfer(aTHX_ prev, next, 0); |
|
|
857 | |